US5486557AExpiredUtilityPatentIndex 80
Furfuryl alcohol-formaldehyde resins
Est. expiryAug 16, 2014(expired)· nominal 20-yr term from priority
Inventors:AKERBERG DENIS W
C08K 3/013
80
PatentIndex Score
18
Cited by
12
References
6
Claims
Abstract
A composition for use as a binder for composite materials comprising a water-compatible furfuryl alcohol-formaldehyde resin and a minor amount of gamma-aminopropyltrimethoxysilane.
Claims
exact text as granted — not AI-modifiedWhat is claimed is:
1. A composition for use as a binder for composite materials comprising: a water-compatible furfuryl alcohol-formaldehyde resins said resin comprising the reaction product of furfuryl alcohol with formaldehyde in a molar ratio of at least 1:2, said resin containing not more than 10% by weight of water insoluble material; and from about 0.15 to 0.30% by weight of gamma-aminopropyltrimethoxysilane based on the weight of the resin.
2. The composition of claim 1 in which said resin further contains not more than about 5% by weight of furfuryl alcohol.
3. The composition of claim 1 in which said resin comprises the reaction product of furfuryl alcohol with formaldehyde in the presence of a weak organic acid having a pKa of at least about 4.
4. The composition of claim 3 in which the organic acid is selected from the group consisting of adipic, acetic, propionic, butyric and succinic acids.
5. The composition of claim 3 in which said resin further contains not more than about 5% by weight of furfuryl alcohol.
6. The composition of claim 1 wherein said resin contains not more than about 5% by weight of water insolubles.Cited by (0)
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